Harden CI and switch release builds to tagged immutable images

cmd/drive/main.go

@@ -0,0 +1,74 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log/slog"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"drive.local/drivev2/internal/adapters/webassets"
+	"drive.local/drivev2/internal/config"
+	"drive.local/drivev2/internal/transport/httpapi"
+)
+
+var version = "dev"
+
+func main() {
+	if err := run(); err != nil {
+		slog.Error("drive stopped", "error", err)
+		os.Exit(1)
+	}
+}
+
+func run() error {
+	command := "serve"
+	if len(os.Args) > 1 {
+		command = os.Args[1]
+	}
+
+	switch command {
+	case "serve":
+		return serve()
+	case "version":
+		fmt.Println(version)
+		return nil
+	default:
+		return fmt.Errorf("unknown command %q", command)
+	}
+}
+
+func serve() error {
+	cfg, err := config.FromEnvironment()
+	if err != nil {
+		return err
+	}
+
+	logger := slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{Level: cfg.LogLevel}))
+	slog.SetDefault(logger)
+
+	server := httpapi.NewServer(cfg, version, logger, webassets.New(cfg.WebRoot))
+	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+
+	errCh := make(chan error, 1)
+	go func() {
+		logger.Info("starting drive", "address", cfg.HTTPAddress, "version", version)
+		errCh <- server.ListenAndServe()
+	}()
+
+	select {
+	case err := <-errCh:
+		if errors.Is(err, httpapi.ErrServerClosed) {
+			return nil
+		}
+		return err
+	case <-ctx.Done():
+		shutdownCtx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
+		defer cancel()
+		return server.Shutdown(shutdownCtx)
+	}
+}